Ответ:

C++

#include <iostream>

using namespace std;

int main()

{

double a, b;

cout << "VVedite a: ";

cin >> a;

cout << "VVedite b:";

cin >> b;

cout << "Summa: " << a + b << endl;

cout << "Raznost: " << a - b << endl;

cout << "Proizbedenie: " << a * b << endl;

}